Electric battery



Patented' Apr., l5, i@i. Y

UNTD) STATES,

entrenar certes.

ROBERT E. 00E/IBS, OFITONTG, ONTO, CANADA, ASSIGNOR T0 NATEGNAL GMBUN CMPANY, ENC., A CGRPORATION GF NEW YORK.

ELECTRC BATTERY.

Application led April 2G, 1921. Serial No. 463,03.

To all whom z't may concern:

Be it known that l, ROBERT H. COMES, a citizen of the United States, residing at Toronto, in' the Province ot' Ontario and Do'- minion of Canada, have invented certain new and useful improvements in Electric Batteries, of which the following is a specification.

My invention relates to electric batteries of the kind wherein one electrodevis hollow and forms a part of the receptacle containing the other parts of the battery. Batteries of this construction usually have a. seal of fusible material which acts as a closure for the rece tacle and serves to hold the other parts o the battery in place. A protective jacket, usually of insulating material, ordinarily surrounds the hollow electrode.

Agn object of my invention is to improve the seal formed by the fusible material.. An-

other object isA to provide means for attaching the protective jacket to the battery so that it will re'main in place, means for preventing displacement of the jacket being especially desirable when the latter is formed without a bottom, thus exposing a portion ot the outer battery electrode to serve as a contact. ln general, the purpose of the invention is to adapt the seal to better perform its function of supporting the parts of the battery.

A further object is to insulate the upper edge of the outer electrode so as to'avoid accidental short-circuiting of the cell. @ther objects will appear from the following4 description.

lin the attached drawing my invention is shown embodied in a dry battery, but it will l be understood that the invention is not limited to such application. y

The drawing shows a longitudinal section of a dry cell having a zinc cup electrode 1, and a central carbon rod electrode 2.' The carbon electrode is surrounded by a bobbin of depolarizing mix Shaving a wrapping 4. The space between the bobbin and the. zinc is filled with electrolyte paste 5. ln the zinc cup, above the bobbin, is placed a cardboard washer 6 which holds the carbon electrode in the center of the cup during Ia part of the construction of the cell. Other linings, wrappings, discs and washers of bibulous material may be used within the cell. in any of the ways well understood in the end at a height intermediate the top of the Yi cup and the top of the carbo-n rod, which latter extends above the zinc cup.

The upper end of the zinc cup has a' contracted portion 9 which is formed by swaging or spinning the metal after ,the cell is assembled with the washer 6 and the parts below it. lf desired, the contents of the zinc cup may be maintained under compression during the operation of turning in the Zinc, so that the parts will be clamped tightly together. The jacket 8 is slipped into its nal position on the zinc after the latter has been contracted at its top. Molten insulating 'material, such as pitch, is' then poured into the top of the jacket until it is completely filled as shown at' 10, only the top of the carbon electrode protruding above it. When the seal has hardened, all the parts including the jacket will'be firmly attached together. rllhe seal will be so locked to the top of the zinc that it cannotpossibly come out without being broken and the adhesion of the seal to the jacket will serve to prevent any movement of the latter. The top of the zinc will be completely covered and insulated, thus avoiding any accidental short-circuiting of the cell, as by bridging from the carbon to the edge of the zinc by the zinc of another cell during shipping. rl`he manner in which the seal encompasses the edge of the zinc cup precludes any possibility of leakage at this point.

The carbon electrode Acap 7 is provided. as shown` with a projecting ange 7 dared away from the carbon and having` its outer edge encompassed by' the material of the seal. This construction adds much to the stability of the cell, since the cap is held against movement as long as the seal remains unbroken, and the carbon is rmly 'attached to the cap.

l claim: l. ln an electric battery, a hollow electrode having an end of reduced diameter, a

vvjacket around said electrode and space-d from said reduced end and extendingbeyond it, and a seal encompassing the edges of the reduced end and adhering to said jacket. i 2. In an electric battery, a hollow electrode having a tapered end, a jacket surrounding said electrode and spaced from said tapered end and extending beyond it, and a seal encompassing the 'edges of the reduced end and adhering to said jacket.

3. In an electric battery, a tubular elec'- trode, a tubular jacket conforming to said electrodethroughout the greater part of its length, said electrode curving away from said jacket at one end to form a channel, and a'seal of fusiblematerial Within the channel, and in contact with said jacket.

gecoate 4. lin an electric battery, a tubular electrode having an upper end of reduced diameter, a second electrode contained therein and protruding from said upper end, a jacket surrounding said tubular electrode and-'terminating intermediate its upper end and the end of the protruding electrode, said jacket conforming to said tubular electrode throughout the greater portion of its length but bein spaced from the reduced end, and a seal lling the upper end of said jacket and being in part inside and in part outside of the tubular electrode.

In testimony whereof, I aiX my signature.

RUBERT H. COMES. 

